// Copyright (C) 2013 Michael Leviston (michael.leviston@gmail.com)

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#ifndef ECS_SYSTEM_H
#define ECS_SYSTEM_H

#include <set>
#include <memory>
#include <algorithm>

#include "Entity.h"
#include "Node.h"

namespace ECS
{
	// Pointer Definitions
	class System;
	typedef std::tr1::shared_ptr<System> spSystem;
	typedef std::tr1::weak_ptr<System> wpSystem;

	/// \brief Interface for common functionality of all systems.
	///
	/// \author Michael Leviston
	class System 
	{
	public:
		virtual unsigned int GetType() = 0;
		virtual unsigned int GetPriority() = 0;
		virtual void Update(float dt) = 0;
		virtual bool MakeNode(spEntity E) = 0;
		virtual void DeleteGenericNode(unsigned int ComponentID) = 0;
		virtual void DeleteSpecificNode(unsigned int nID) = 0;
		virtual bool HasComponentID(unsigned int ComponentID) = 0;
		virtual std::map<unsigned int, spNode>* GetNodes() = 0;
	};
}

#endif // ECS_SYSTEM_H